<div id="wrapper">
  <form action="">
    <select name="province" id="province"   (change)="doChange($event)">
      <option value="请选择">--请选择--</option>
      <option [value]="data" *ngFor="let data of province" >{{data}}</option>
    </select>
    <span>省</span>
    <select name="city" id="city"  (change)="doArea($event)">
      <option value="">--请选择--</option>
      <option [value]="obj" *ngFor="let obj of city">{{obj}}</option>
    </select>
    <span>市</span>
    <select name="area" id="area" >
      <option value="">--请选择--</option>
      <option [value]="a" *ngFor="let a of area">{{a}}</option>
    </select>
    <span>区县</span>
    <div>
      <input type="submit" value="确定">
    </div>

  </form>
</div>
